Chen ERD Symbols
Chen ERD templates include plenty of special shapes, entity with items, user, relationship, entity, attribute, aggregation, line connector, double line connector, one to many caption, many to many, one to one caption, variable to variable. All the shapes will greatly help you when drawing Chen ERD diagrams.
Chen ERD Symbols
Chen ERD Shapes
Entity in a database could be a single person, place, or thing about which data can be stored.
Attribute is a piece of information which determines the properties of a field or tag in a database or a string of characters in a display.
Aggregation is a special type of association in which objects are assembled or configured together to create a more complex object. An aggregation describes a group of objects and how you interact with them.
One to many (N) is by far the most common relationship type.
Many to many (M) lets you relate each row in one table to many rows in another table, and vice versa. Many-to-many relationships often hide meaning.
Composition relationship, which was named composition association relationship in UML 1.4, represents whole-part relationships and is a form of aggregation. A composition relationship specifies that the lifetime of the part classifier is dependent on the lifetime of the whole classifier.
Inheritance relationship helps to communicate structure and inheritance of an object model. Inheritance relationships organize classes into generalization-specialization (superclass-subclass) hierarchies; they provide a basic re-use mechanism for sharing attributes and operations.
Dependency relationship is a relationship in which one element, the client, uses or depends on another element, the supplier.
Association is a relationship between two classifiers, such as classes or use cases, that describes the reasons for the relationship and the rules that govern the relationship.
Need fresh looking Chen ERD symbols for your design? These Chen ERD symbols are a cinch to pop in. And their crisp, fine detail will make spectacular, easy-to-understand diagrams and presentations to your customers.